What to Build for Middle-Agers to Come? Attractive and Necessary Functions of Exercise-Promotion Mobile Phone Apps: A Cross-Sectional Study

Gen-Yih Liao   ^{1, 2} , PhD ;   Yu-Tai Chien   ³ , MSc ;   Yu-Jen Chen   ¹ , PhD ;   Hsiao-Fang Hsiung   ⁴ , PhD ;   Hsiao-Jung Chen   ⁴ , MSc ;   Meng-Hua Hsieh   ¹ , MSc ;   Wen-Jie Wu   ^{1, 5} , PhD

¹ Department of Information Management, Chang Gung University, Taoyuan City, Taiwan

² Dept of Nursing, Chang Gung Memorial Hospital, Taoyuan Branch, Taoyuan City, Taiwan

³ Department of Information Management, National Taiwan University, Taipei, Taiwan

⁴ Department of Nursing, Chang Gung University of Science of Technology, Guishan District, Taoyuan City, Taiwan

⁵ Division of Chinese Gynecology, Center for Traditional Chinese Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan, Kwei-Shan Tao-Yuan, Taiwan